the rewrite branch builds, not tested yet

[dosdemo] / src / dos / vga.h

diff --git a/src/dos/vga.h b/src/dos/vga.h
new file mode 100644 (file)
index 0000000..c6d7070
--- /dev/null
+++ b/src/dos/vga.h
@@ -0,0 +1,30 @@
+#ifndef VGA_H_
+#define VGA_H_
+
+#include "inttypes.h"
+
+int vga_setmode(int mode);
+
+#ifdef __WATCOMC__
+void vga_setpal(int16_t idx, uint8_t r, uint8_t g, uint8_t b);
+#pragma aux vga_setpal = \
+       "test ax, 0x8000" \
+       "jnz skip_dacaddr" \
+       "mov dx, 0x3c8" \
+       "out dx, al" \
+       "skip_dacaddr:" \
+       "mov dx, 0x3c9" \
+       "mov al, bl" \
+       "shr al, 2" \
+       "out dx, al" \
+       "mov al, bh" \
+       "shr al, 2" \
+       "out dx, al" \
+       "mov al, cl" \
+       "shr al, 2" \
+       "out dx, al" \
+       parm[ax][bl][bh][cl] \
+       modify[dx];
+#endif /* __WATCOMC__ */
+
+#endif /* VGA_H_ */